Lighting motometer



April 9, 1929. P. D. YANKOFF LIGHTING MOTOMETER Filed My 5, 1925 2 Sheets-Sheet m w o W N,

Patented Apr.v 9, 1929.

UNITED STATES sereni' OFFICE.

LIGHTING Morciano-cnn.

Application ledMay 5, 1923.y Serial N0. 636,899.

rlhis invention relates to meters, the primary object of the invention being to provide means to illuminate a lamp adjacent to the meter when the motor to which the device is applied becomes overheated or reaches a dangerously high temperature.

Another object of the invention is to provide means whereby the lamp may be caused to illuminate under predetermined degrees of temperature, thereby providing a device that may be used in connection with various types of motors.

A still further object of the invention is to provide a meter formed with a battery compartment, whereby a battery sutliciently large to supply the necessary current to illuminate a small lamp, maybe contained therein. n n

Vith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter def 'scribed and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is a front elevational view of a meter constructed in accordance with the invention, the lower portion thereof being broken away.

Figure 2 is a sectional view taken on line 2 2 of Figure 1. Y

Figure 3 is a rear elevational view thereof.

Figure t is a longitudinal sectional view through the mercury tube.

Figure 5 is a sectional view taken on line 5 5 of Figure 1.

Referring to the drawings in detail, the reference character 5 designates a body portion of the meter which is formed with a reymovable wall 6 that is secured in position by means of the screws 7. Y

The body portion 5 is formed with a sight opening 8 that registers with the sight opening 9 formed in the removable wall 6, whereby the bulb l() to be hereinafter more fully described, may be viewed by the operator.

A partitioning wall 11 divides the body portion of the meter into an upper lamp containing compartment 12 and a lower battery containing compartment 13, the compartment 13 being suiiiciently large to vaccommodate a relatively small battery for supplying electric energy to the lamp l0 disposed thereabove.

Positioned in a suitable opening formed in the partitioning wall l1 is a lamp socket 12 which is provided with the usual contar members to transmit electric energy to the lamp supported therein. Positioned within the meter is a mercury tube 14 which is relatively long and provided with a cord terminal 15 at its upper end and a plurality of cord terminals 16 disposed throughout the length thereof, the cord terminals being arranged iny staggered relation with respect to each other as clearly shown by Figure 4l of the drawings, so that as the mercury in 'the tube rises and contacts with the terminals the circuit will be completed causing signals to be made at any one of the dierent 'ten peratures.

The battery is provided witha central longitudinal bore through which the tube 14 extends so that the tube will be subjected to the heat from the radiator. The battery is indicated at 17 and has connection with one of the cord terminals 1G while the opposite pole of the battery has connection with the lamp socket to supply electric energy thereto, the connection between the battery and lamp socket being indicated at 18, while the connection between the battery and mercury tube is indicated at 19. The lamp socket is also connected with the cord terminal 15 through the connect-ing wire 20, which may have one of its ends connected with any one of the terminals 1G to cause a circuit to be completed by the mercury within the tube at any desired point throughout the length of the tube.

Thus it will be seen that as the motor to which the device is applied, overheats the mercury 21 in the mercury tube rises. completing the circuit through the cord terminals and light-ing the lamp 10, signaling to the operator that the motor has reached a dangerously high temperature.

In order that the mercury may be viewed by the operator, a sight opening 22 is provided in the rear wall 6, which sight opening is arranged directly in front of the tube 14. The meter forming the essence of the invention is supplied with transversely extending hollow arms 23 in which the wires 24 and 25 are housed, openings 2G being pro vided in the body portion of the meter' to accommodate the wires.

It it is desired to connect the lamp l() v with the lighting system of the motor-vehicle l' port-ion having a recess" formed in thebase thereof, a lamp soclret mounted on the partition and exteiidinev therethrough, a. lamp in the socket, arbattery closely itted in the recess, said battery having an axial opening :formed therein, a meicury thermostattube in the body portion' and extending through the opening of the battery and into the bottom 01"' the body portion, terminals on the mercury thermostat tube, wires providing a. circuit bet-ween the battery terminals on the mercury thermostat and lamp, a removable side member or the body portion and having an elongated opening to receive one edge of the `partition and having an opening exposing the lamp, the sidesof the body portion extending inwardly above the formed therein, a mercury thermostattube in the body portion and `exten-ding vthrough the opening' ot the battery and into the bottom oi the body portion, terminals on the mercury thermostat-tube, wires providing a circuit between the battery terminals on the mercury tlierm'ostattube and lamp, a removable side member 'for the bodyY portion andl'liaving an elongated opening to receive onel edgeV of the partition and havingan opening exposing the lamp and having Van Y opening exposing a portion of tliethermostat tube, the sides of the body portion extending inwardly above the battery to hold the battery against vertical movement, and means toi-securing the removable side'members in positionr Y 1n testimony-that claim' the foregoing as my own, I have-hereto allixed my sig nature;l

PETER niiivinriiorr YANKorr. 

